Nothing painfully obvious without seeing whatever is behind this expression, but if the blue parts are form/report controls, try wrapping in brackets [ ] especially since the underscore might be interpreted as a line continuation character. I'm also not sure about the use of multiple comparison operators such as >=. I'd also try just one or the other to see if it matters because I think I came across this before but can't recall the outcome.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.